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Calculus- Early Transcendentals, 2021a

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1.1. Algebra 17<br />

Exercises for 1.1<br />

Exercise 1.1.1 Simplify the following expressions as much as possible assuming x,y > 0:<br />

(a) x3 y −1/3<br />

3<br />

√<br />

y 2 x 2<br />

(b) 3x−1/3 y −2 3√ x 4<br />

√<br />

9xy −3<br />

(c)<br />

( 16x 2 y<br />

x 4 ) 1/2 3<br />

√<br />

x 2<br />

2 √ y<br />

Exercise 1.1.2 Find the constants a,b,c if the expression<br />

is written in the form ax b y c .<br />

4x −1 y 2 3√ x<br />

2x √ y<br />

Exercise 1.1.3 Find the roots of the quadratic equation<br />

x 2 − 2x − 24 = 0<br />

Exercise 1.1.4 Solve the equation<br />

x<br />

4x − 16 − 2 = 1<br />

x − 3<br />

Exercise 1.1.5 Solve the following inequalities. Write your answer as a union of intervals.<br />

(a) 3x + 1 > 6<br />

(b) 0 ≤ 7x − 1 < 1<br />

(c)<br />

x 2 (x − 1)<br />

(x + 2)(x + 3) 3 ≤ 0<br />

(d) x 2 + 1 > 0<br />

(e) x 2 + 1 < 0<br />

(f) x 2 + 1 > 2x<br />

(g) x 3 > 4x<br />

(h) x 3 ≥ 4x 2<br />

(i) 1 x > 2<br />

(j)<br />

x<br />

x + 2 ≤ 2<br />

x − 1<br />

Exercise 1.1.6 Solve the equation |6x + 2| = 1.<br />

Exercise 1.1.7 Find solutions to the following absolute value inequalities. Write your answer as a union<br />

of intervals.

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